Hard Drive Issues

[Garrett Cooper]

On Nov 7, 2006, at 1:49 PM, Richard McIntyre wrote:

> Tom Judge wrote:
>
>> Richard McIntyre wrote:
>>
>>> I'm having a similar problem,
>>> Oct 13 03:01:31 tco1 kernel: ad2: FAILURE - READ_DMA  
>>> status=51<READY,DSC,ERROR> error=40<UNCORRECTABLE> LBA=181778119
>>> Oct 13 07:11:15 tco1 kernel: ad2: FAILURE - READ_DMA  
>>> status=51<READY,DSC,ERROR> error=40<UNCORRECTABLE> LBA=181778119
>>>
>>> I'm assuming that particular sector on the drive is dying, I have  
>>> backed everything up on the drive, can anyone give me more  
>>> information, should the drive simply be replaced or is it  
>>> possible that this is simply a TOC error and could be corrected  
>>> by newfs to the drive?
>>>
>>> I'm guessing it will need to be replaced, output of smartctl is  
>>> below....
>>>
>>> Thanks
>>> ~Richard
>>>
>>> Error 7742 occurred at disk power-on lifetime: 16036 hours (668  
>>> days + 4 hours)
>>>  When the command that caused the error occurred, the device was  
>>> active or idle.
>>>
>>>  After command completion occurred, registers were:
>>>  ER ST SC SN CL CH DH
>>>  -- -- -- -- -- -- --
>>>  40 51 04 c7 b6 d5 ea  Error: UNC 4 sectors at LBA = 0x0ad5b6c7 =  
>>> 181778119
>>> <etc>
>>
>>
>> Looks like you disk is on its way out,  from the look of the above  
>> errors,  I would try dd'ing the disk onto a new disk the running  
>> an fsck to make sure everything is ok.  I wouldnt hold out much  
>> hope for recovering the data on that sector though.
>>
>> Tom J
>>
>
> All,
>
> I've put a new disk into the system, The current disk is 200 GB,  
> the new disk is 250 GB.
> If I run the command:
> dd if=/dev/ad2 of=/dev/ad3 conv=noerror
>
> Will this copy the (changing the appropriate device names of  
> course) the disk as a whole? Will I lose the 50 GB difference?
> Is there another way? (like the dump, tar, or just plain copy  
> command?)
>
> The drive is two partitions, one 100GB and the remainder on the  
> other partition. The files contained are backups of my virtual  
> hosted sites and the apache directories (including the apache/bin  
> files).
>
> Any suggestions? I've read a good deal of forums online but they  
> seem to be contradicting. 1/2 say I will loose the remainder of the  
> drive space, 1/2 say that dd is not the best way to go. (there is  
> roughly 35 GB of data actually on the device).
>
>
> FreeBSD tco1.thecompanyonline.com 5.3-RELEASE FreeBSD 5.3-RELEASE  
> #0: Mon May  2 22:32:50 EDT 2005     rem at tco1.thecompanyonline.com:/ 
> usr/src/sys/i386/compile/TCO1.2005.05.02.001  i386
>
> Thank you for the help!

	Too bad you can't just mount the disk image and grab files on  
demand :(...
	You should be able to expand the disk though if I remember correctly  
using the tunefs command... don't have my terminal right in front of  
me though to confirm whether or not this is the case though..
-Garrett